U.S. patent number 8,083,170 [Application Number 12/779,227] was granted by the patent office on 2011-12-27 for dispensing gap defined between loading door and main body of automatic towel dispenser.
This patent grant is currently assigned to Innovia Intellectual Properties, LLC. Invention is credited to William Bryant Troutman, II, William Bryant Troutman.
United States Patent |
8,083,170 |
Troutman , et al. |
December 27, 2011 |
Dispensing gap defined between loading door and main body of
automatic towel dispenser
Abstract
A towel dispenser includes a housing for receiving toweling. The
housing includes a main body; a loading door that is configured to
rotate relative to the main body between a closed position and an
open position; and a guide system that includes a first roller
attached to the main body and a second roller attached to the
loading door. The towel dispenser may include a motor for driving
dispensing of the toweling from the housing and an associated
sensor. The towel dispenser can be mounted to an underside of a
cabinet. In an aspect, the front wall of the main body and a lip of
the loading door collectively define a gap to which the guiding
system guides the toweling and through which towels are dispensed
when the loading door is in the closed position.
Inventors: |
Troutman; William Bryant
(Charlotte, NC), Troutman, II; William Bryant (Charlotte,
NC) |
Assignee: |
Innovia Intellectual Properties,
LLC (Charlotte, NC)
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Family
ID: |
40430797 |
Appl.
No.: |
12/779,227 |
Filed: |
May 13, 2010 |
Prior Publication Data
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Document
Identifier |
Publication Date |
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US 20100219283 A1 |
Sep 2, 2010 |
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Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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11854193 |
Sep 12, 2007 |
7887005 |
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Current U.S.
Class: |
242/563.2;
242/564.4; 242/419.5 |
Current CPC
Class: |
A47K
10/36 (20130101); A47K 2010/3668 (20130101); A47K
2010/3681 (20130101); A47K 10/3612 (20130101) |
Current International
Class: |
B65H
26/06 (20060101) |
Field of
Search: |
;242/563,563.2,564,564.1,564.3,564.4,565,566,596.8 ;312/34.8
;225/93,106 ;226/181 |
References Cited
[Referenced By]
U.S. Patent Documents
Other References
Information Disclosure Statement (IDS) Letter Regarding Common
Patent Application(s), dated Nov. 10, 2010. cited by other.
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Primary Examiner: Rivera; William A
Attorney, Agent or Firm: Tillman Wright, PLLC Tillman; Chad
D. Doerre; Jeremy C.
Parent Case Text
CROSS-REFERENCE TO RELATED APPLICATION
The present application is a U.S. continuation patent application
of, and claims priority under 35 U.S.C. .sctn.120 to, U.S.
nonprovisional patent application Ser. No. 11/854,193, filed Sep.
12, 2007 now U.S. Pat. No. 7,887,005, which nonprovisional patent
application published as U.S. patent application publication no.
2009/0065628, which patent application and patent application
publication, and any patent issuing therefrom, are incorporated by
reference herein.
Claims
What is claimed is:
1. A towel dispenser, comprising: (a) a housing for receiving
toweling, the housing comprising, (i) a main body that comprises a
front wall of the housing, (ii) a loading door that is configured
to rotate relative to the main body between, (A) a closed position,
in which the housing is configured to dispense towels therefrom,
and (B) an open position, in which the housing is configured to
receive toweling therein, and (iii) a guide system configured to
guide the toweling while towels are dispensed from the housing, the
guide system comprising a first roller attached to the main body
and a second roller attached to the loading door; (b) wherein the
loading door comprises a curved body defining an area within which
the toweling is positioned when the toweling is received in the
housing and a lip that extends from the curved body and defines a
generally planar surface; (c) wherein the front wall of the main
body and the lip of the loading door collectively define a gap to
which the guiding system guides the toweling and through which
towels are dispensed when the loading door is in the closed
position; and (d) wherein the generally planar surface of the lip
of the loading door extends generally downwardly below the curved
body of the loading door when the loading door is in the open
position.
2. The towel dispenser of claim 1, further comprising both a motor
and a transmission attached to the main body of the housing and not
to the loading door, wherein the second roller attached to the
loading door is connectable to the transmission and is driven by
the motor via the transmission when the loading door is in the
closed position.
3. The towel dispenser of claim 2, wherein the second roller
comprises an axis of rotation that is fixed relative to the loading
door regardless of whether the loading door is in the closed
position or the open position, or transitioning therebetween;
wherein the axis of rotation of the first roller is substantially
parallel to the axis of rotation of the second roller regardless of
whether the loading door is in the closed position or the open
position, or transitioning therebetween; and wherein the second
roller attached to the loading door and the first roller attached
to the housing are configured to trap toweling therebetween when
the loading door is rotated from the open position to the closed
position with a length of the toweling extending over the loading
door.
4. The towel dispenser of claim 2, wherein a portion of the main
body extends over the lip of the loading door when the loading door
is in the closed position, but not when the loading door is in the
open position; and wherein a motor for feeding the toweling outside
of the housing during dispensing of a towel is located within the
portion of the main body extending over the lip of the loading
door.
5. The towel dispenser of claim 2, wherein the loading door forms a
majority of the underside of the dispenser when the loading door is
in the closed position.
6. An automatic paper towel dispenser, comprising: (a) toweling
comprising a roll of perforated paper towels; and (b) a housing in
which the roll of perforated paper towels is received for
dispensing, the housing comprising, (i) a main body, (ii) a loading
door that is configured to rotate relative to the main body
between, (A) a closed position, in which the housing is configured
to dispense towels therefrom, and (B) an open position, in which
the housing is configured to receive toweling therein, and (iii) a
guide system configured to guide the toweling while towels are
dispensed from the housing, the guide system comprising a first
roller attached to the main body and a second roller attached to
the loading door, and (iv) a motor located within the housing for
feeding the toweling outside of the housing during dispensing of a
towel; (c) wherein the loading door comprises a curved body
defining an area within which the toweling is positioned when the
toweling is received in the housing and a lip that extends from the
curved body and defines a generally planar surface; (d) wherein the
front wall of the main body and the lip of the loading door
collectively define a gap to which the guiding system guides the
toweling and through which towels are dispensed when the loading
door is in the closed position; and (e) wherein the generally
planar surface of the lip of the loading door extends generally
downwardly below the curved body of the loading door when the
loading door is in the open position.
7. The automatic paper towel dispenser of claim 6, further
comprising a transmission attached to the main body of the housing,
wherein the second roller attached to the loading door is
connectable to the transmission and is driven by the motor via the
transmission when the loading door is in the closed position.
8. The automatic paper towel dispenser of claim 7, wherein the
second roller comprises an axis of rotation that is fixed relative
to the loading door regardless of whether the loading door is in
the closed position or the open position, or transitioning
therebetween; wherein the axis of rotation of the first roller is
substantially parallel to the axis of rotation of the second roller
regardless of whether the loading door is in the closed position or
the open position, or transitioning therebetween; and wherein the
second roller attached to the loading door and the first roller
attached to the housing are configured to trap toweling
therebetween when the loading door is rotated from the open
position to the closed position with a length of the toweling
extending over the loading door.
9. The automatic paper towel dispenser of claim 7, wherein a
portion of the main body extends over the lip of the loading door
when the loading door is in the closed position, but not when the
loading door is in the open position; and wherein the motor for
feeding the toweling outside of the housing during dispensing of a
towel is located within the portion of the main body extending over
the lip of the loading door.
10. The automatic paper towel dispenser of claim 7, wherein the
loading door forms a majority of the underside of the dispenser
when the loading door is in the closed position.
11. A towel-dispensing apparatus, comprising: (a) a cabinet; and
(b) a paper towel dispenser mounted to an underside of the cabinet,
the paper towel dispenser comprising a housing in which toweling
comprising a roll of perforated paper towels is contained for
dispensing, the housing comprising, (i) a main body, (ii) a loading
door that is configured to rotate relative to the main body
between, (A) a closed position, in which the housing is configured
to dispense towels therefrom, and (B) an open position, in which
the housing is configured to receive toweling therein, and (iii) a
guide system configured to guide the toweling while towels are
dispensed from the housing, the guide system comprising a first
roller attached to the main body and a second roller attached to
the loading door, and (iv) a motor located within the housing for
feeding the toweling outside of the housing during dispensing of a
towel; (c) wherein the loading door comprises a curved body
defining an area within which the toweling is positioned when the
toweling is received in the housing and a lip that extends from the
curved body and defines a generally planar surface; (d) wherein the
front wall of the main body and the lip of the loading door
collectively define a gap to which the guiding system guides the
toweling and through which towels are dispensed when the loading
door is in the closed position; and (e) wherein the generally
planar surface of the lip of the loading door extends generally
downwardly below the curved body of the loading door when the
loading door is in the open position.
12. The towel-dispensing apparatus of claim 11, wherein the cabinet
is mounted to a wall.
13. The towel-dispensing apparatus of claim 11, wherein the cabinet
is mounted to a ceiling.
14. The towel-dispensing apparatus of claim 11, further comprising
a transmission attached to the main body of the housing, wherein
the second roller attached to the loading door is connectable to
the transmission and is driven by the motor via the transmission
when the loading door is in the closed position.
15. The towel-dispensing apparatus of claim 14, wherein the second
roller comprises an axis of rotation that is fixed relative to the
loading door regardless of whether the loading door is in the
closed position or the open position, or transitioning
therebetween; wherein the axis of rotation of the first roller is
substantially parallel to the axis of rotation of the second roller
regardless of whether the loading door is in the closed position or
the open position, or transitioning therebetween; and wherein the
second roller attached to the loading door and the first roller
attached to the housing are configured to trap toweling
therebetween when the loading door is rotated from the open
position to the closed position with a length of the toweling
extending over the loading door.
16. The towel-dispensing apparatus of claim 14, wherein a portion
of the main body extends over the lip of the loading door when the
loading door is in the closed position, but not when the loading
door is in the open position; and wherein the motor for feeding the
toweling outside of the housing during dispensing of a towel is
located within the portion of the main body extending over the lip
of the loading door.
17. The towel-dispensing apparatus of claim 14, wherein the loading
door forms a majority of the underside of the dispenser when the
loading door is in the closed position.
18. The towel-dispensing apparatus of claim 11, wherein the loading
door forms a majority of the underside of the dispenser when the
loading door is in the closed position.
19. The towel-dispensing apparatus of claim 11, further comprising
a sensor associated with the motor and configured to sense during
dispensing a towel in the gap that is collectively defined by the
loading door and the main body.
20. The towel-dispensing apparatus of claim 11, wherein the housing
is configured such that movement of the loading door to the closed
position, with toweling inserted in the housing and with a leading
length of the toweling draped over the loading door, automatically
threads the toweling between the first and second rollers, without
manual threading of the toweling, by the act of the loading door
being moved to the closed position.
Description
COPYRIGHT STATEMENT
All of the material in this patent document is subject to copyright
protection under the copyright laws of the United States and other
countries. The copyright owner has no objection to the facsimile
reproduction by anyone of the patent document or the patent
disclosure, as it appears in official governmental records but,
otherwise, all other copyright rights whatsoever are reserved.
BACKGROUND
This invention relates generally to towel dispensers and more
particularly to "hands free" towel dispensers.
Towel dispensers are well known and generally include a housing
configured to receive a roll of toweling, a guide system that
defines a path for the toweling, and a motor for moving the
toweling along the path to the exterior of the housing. The guide
system can include rollers or fixed guides and typically includes a
driven roller connected to the motor. A switch or sensor for
detecting motion or proximity of an object is provided to initiate
the operation of the motor. For example, in a known dispenser, a
controller is electrically connected to the sensor and is
configured to activate the motor when the sensor generates a signal
that indicates the presence of a hand. Conventional towel
dispensers are configured to dispense towels from continuous rolls
of non-perforated toweling and include a device for cutting the
toweling to dispense individual towels. The length of the
individual towels provided by the dispenser is determined by the
amount of time that the motor is operated or by measuring the
individual towel as it is dispensed.
Conventional toweling dispensers operate as follows. A roll of
toweling is placed within the housing and threaded through the
guide system. A user causes a towel to be dispensed by placing a
hand or other object near the sensor. Alternatively, the dispensing
of toweling can be initiated by pressing a button or switch that is
configured to activate the motor. Dispensing of the toweling can be
stopped when the hand is removed or when a predetermined length of
toweling has been dispensed.
One problem associated with conventional toweling dispensers is
that they are not configured to accommodate typical pre-perforated
toweling such as that used typical households. Another problem with
conventional dispensers is that they can be difficult to load and
thread the toweling along the path defined by the guide system.
BRIEF SUMMARY OF THE INVENTION
Accordingly, there is a need to provide a towel dispenser for
automatically dispensing an individual towel wherein the length is
determined by a pre-made perforation such as those formed in
consumer paper towels.
There is a further need to provide a towel dispenser in which
toweling can be relatively easily loaded.
Therefore there is provided a towel dispenser that includes a
housing for containing toweling. The toweling includes a first
towel and a second towel that are connected together and separable
at a perforation formed between the first and second towel. The
housing is configured to define a path P for the toweling. A motor
and a perforation sensor are provided for dispensing the toweling
and are electrically connected together. The perforation sensor is
configured to generate a signal indicative of the presence of the
perforation and the motor is configured to deactivate in response
to the signal.
According to another embodiment of the present invention, the motor
and a controller are positioned within the housing. The controller
is electrically connected to both the motor and the perforation
sensor and is configured to activate and deactivate the motor after
the perforation sensor generates the signal indicative of a
perforation.
According to another embodiment of the present invention, the
controller is configured to deactivate the motor a predetermined
period of time after receiving the signal.
According to another embodiment of the present invention, the
predetermined period of time is sufficient for the perforation to
exit the housing.
According to another embodiment of the present invention, the
predetermined period of time is sufficient for the perforation to
be aligned with a separation device.
According to another embodiment of the present invention, the
housing includes a separation device when the motor is
deactivated.
According to another embodiment of the present invention, the
separation device is an edge positioned near the path P.
According to another embodiment of the present invention, there is
provided a drive roller and a sensor roller, each having outer
surfaces that define a portion of path P.
According to another embodiment of the present invention, the
perforation is expanded opened when the perforation is in proximity
to the sensor.
According to another embodiment of the present invention, the drive
roller is configured to operate such that it has a first surface
speed and the sensor roller is configured to operate such that it
has a second surface speed.
According to another embodiment of the present invention, the first
surface speed of the drive roller is greater than the second
surface speed of the sensor roller such that the toweling is in
tension between the drive roller and the sensor roller. According
to another embodiment of the present invention, the sensor roller
is generally cylindrical and defines a first diameter at each of a
first end and a second end and a second diameter between the first
end and the second end, wherein the second diameter is greater than
the first diameter.
According to another embodiment of the present invention, the
second diameter is defined by a ridge formed between the first and
second end of the sensor roller.
According to another embodiment of the present invention, the
housing includes a guide system that defines path P and includes a
first set of guiding members positioned on a first side of the
toweling and a second set of guiding members positioned on a second
side of the toweling.
According to another embodiment of the present invention, the
housing includes a main body and a loading door pivotally attached
to the main body and movable between a closed first position and an
open second position, the second set of guiding members being
attached to the loading door.
According to another aspect of the present invention, there is
provided a method of dispensing towels from a dispenser. A housing
is provided for containing toweling. The toweling includes a first
towel and a second towel that are connected together and separable
at a perforation formed between the first and second towel, the
housing being configured to define a path P for the toweling. A
motor and a sensor for sensing the perforation are electrically
connected together. The sensor is configured to generate a signal
indicative of the presence of the perforation and the motor is
configured to deactivate accordingly. The motor is activated to
propel the toweling along path P. The motor is deactivated after
the sensor generates a signal indicating the presence of the
perforation.
According to another embodiment of the present invention, a
controller is provided that is electrically connected to the motor
and to the sensor, and the controller is configured to deactivate
the motor a predetermined period of time after the signal is
generated by the sensor.
According to another embodiment of the present invention, the
perforation is opened when the perforation is near the sensor.
According to another embodiment of the present invention, a drive
roller and a sensor roller are configured to be driven by the
motor, wherein the toweling contacts drive roller in path P after
it contacts the sensor roller in path P. The drive roller and the
sensor roller are operated such that the drive roller has a faster
surface speed than the sensor roller such that tension is applied
to the toweling between the drive roller and the sensor roller.
According to another embodiment of the present invention, the motor
is operated until the perforation has traveled along path P past
the drive roller.
According to another embodiment of the present invention, there is
provided a method for loading a towel dispenser. A housing for
receiving toweling is provided, wherein the toweling includes a
first towel and a second towel that are connected together and
separable along a perforation formed between the first and second
towel. A movable loading door is attached to the housing and has an
open first position wherein toweling can be loaded into the housing
and a closed second position. The housing also includes a guide
system configured to define a path P for the toweling and the guide
system includes a first set of guiding members attached to the
housing and a second set of guiding members attached to the loading
door such that the guide system defines path P when the loading
door is in the first position. The loading door is moved to the
open second position. Toweling is placed within the housing. A
length of toweling is extended from the housing over the loading
door. The loading door is moved to the closed first position such
that toweling extends along path P.
According to another embodiment of the present invention, a motor
and a controller are positioned within the housing for dispensing
the toweling are provided. A sensor for sensing the perforation is
also provided wherein the sensor is configured to generate a signal
indicative of the presence of the perforation and the controller is
configured to receive the signal and to deactivate the motor.
BRIEF DESCRIPTION OF THE DRAWINGS
The subject matter that is regarded as the invention may be best
understood by reference to the following description taken in
conjunction with the accompanying drawing figures in which:
FIG. 1 is a perspective view of a towel dispenser according to one
embodiment of the present invention showing the dispenser in a
typical application;
FIG. 2 is a perspective view of the towel dispenser shown in FIG.
1;
FIG. 3 is a side cut-away schematic view of a portion of the
dispenser shown in FIG. 1 showing a first toweling path;
FIG. 4 is a side cut-away schematic view of a portion of the towel
dispenser shown in FIG. 1 showing a second toweling path;
FIG. 5 is a perspective schematic view of a portion of the
dispenser in an open position for receiving a roll of toweling;
and
FIG. 6 is a partial perspective schematic view of a portion of the
dispenser during operation of one embodiment of the present
invention.
DETAILED DESCRIPTION
Referring to the drawings wherein identical reference numerals
denote the same elements throughout the various views, FIG. 1 shows
a towel dispenser 10 according to one embodiment of the present
invention. The dispenser 10 is for automatically dispensing
conventional pre-perforated paper towels such that they can be
separated at a perforation 16. Therefore the dispenser 10 can be
mounted where consumer paper towels are typically made available
such as under a household cabinet 18 and above a counter 19 as
shown in FIG. 1.
Referring now to FIGS. 2 and 3, dispenser 10 includes a housing 20
that includes a main body 22 and a loading door 24. The main body
22 includes side walls 26 and a front wall 28. The main body 22
defines a cavity 32 that is dimensioned to receive toweling 12. In
this regard, tabs 34 are positioned within cavity 32 on opposite
sides of cavity 32 for supporting the toweling 12. In the
illustrated embodiment, the cavity 32 is dimensioned to receive the
toweling 12 in the form of a roll 14 of standard consumer paper
toweling but it should be appreciated that the toweling 12 could be
accordion folded or the like. A perforation 16 (as shown in FIG. 6)
is formed within the toweling 12 of roll 14. The perforation 16 is
dimensioned to define an edge of an individual towel and to assist
separation of individual towels from the roll 14. Roll 14 will
typically contain many perforations 16. It should be appreciated
that, alternatively, the toweling 12 could be accordion folded or
otherwise provided. One edge of front wall 28 defines a separation
device 36 for further assisting the separation of individual towels
from roll 14.
As used herein, the term "toweling" refers to any sheet or web
material that is suitable for wiping or drying. By way of example
and not limitation, toweling 12 can be formed of paper, a synthetic
material (such as a polymeric film), woven textile, or a non-woven
textile material. As used herein, the term "perforation" refers to
the point of separation between individual sheets within the
toweling 12 and can be defined by a score, a opening or row of
openings formed in toweling 12 such that an individual towel can be
separated from the toweling 12.
The loading door 24 is pivotally attached to the main body 22 and
movable between a closed first position and an open second
position. When in the closed first position, the door 24 covers an
opening 38 that is formed in the main body 22. When in the open
second position, the door 24 provides for access to the cavity 32
through the opening 38. Position indicating sensors (not shown) are
provided for generating a signal indicative of the position of the
door 24. The door 24 includes a curved body 42, a lip 44, and two
bracket walls 46 that are disposed generally perpendicularly to the
lip 44 and at opposite sides thereof. As can be seen in FIG. 1,
when the door 24 is in the closed first position, lip 44 of door 24
and the front wall 28 define a gap 45.
Referring now to FIG. 5, a guide system 50 is positioned within the
housing 20 and includes a plurality of guiding members. The guide
system 50 defines a path P as shown in FIGS. 3 and 4. The path P
can contact the guide bar 53 as shown in FIG. 3 or can bypass the
guide bar 53 as shown in FIG. 4. The guide system 50 is configured
such that when the roll 14 of toweling 12 is positioned within the
cavity 32, toweling 12 extends along path P through the gap 45.
A first set of guiding members are attached to the main body 22 and
include a drive roller 52 and a guide bar 53. The drive roller 52
extends between side walls 26 and is positioned between cavity 32
and front wall 28. Guide bar 53 also extends between side walls 26
and is positioned between the drive roller 52 and the cavity 32. A
second set of guiding members includes a rotatable sensor roller 54
and rotatable a pinch roller 58 that each extend between the two
bracket walls 46 and are movable with the door 24.
Continuing to refer to FIG. 5, the sensor roller 54 is generally
cylindrical and is connectable to a motor 62 via a transmission and
that includes a gear 66 that is attached to the sensor roller 54.
In the illustrated embodiment, the sensor roller 54 is configured
to be driven such that it has a slower surface speed that the drive
roller 52. In this manner, tension is created in toweling 12
between the sensor roller 54 and the drive roller 52 such that the
perforation 16 can be expanded. Alternatively, the sensor roller 54
is not attached to the motor 62 but is configured to be rotated by
contact with the toweling 12.
In the illustrated embodiment, the sensor roller 54 has a centrally
formed circumferential ridge 55 disposed between two end sections
56. The end sections 56 have a first diameter and the ridge 55 has
an second diameter. The second diameter of the ridge 55 is greater
than the first diameter and is for expanding the perforation 16 as
it passes over the sensor roller 54. Alternatively, the sensor
roller 54 could have a consistent diameter across its full length
and could be straight or bowed for expansion of the perforation
16.
As can be seen in FIG. 5, the sensor roller 54 is positioned
generally parallel to the pinch roller 58. The pinch roller 58 is
generally cylindrical and of uniform diameter and includes a
plurality of sub-rollers 59. The pinch roller 58 is also
connectable to motor 62 via the transmission.
Referring now to FIGS. 3 and 4, the motor 62 is mounted on one of
the side walls 26 and is configured to be powered by a battery 68.
The motor 62 is mechanically connected to the drive roller 52 by
the transmission. In the illustrated embodiment, the transmission
includes a plurality of gears. As used herein, the term "gears"
refers to a device having a toothed surface that is configured to
interlock with another toothed surface. Alternatively the
transmission could include a belt and pulley, wheels, or other such
power transmitting structure.
Referring now to FIG. 3, a perforation sensor 80 is included in the
housing 20 and is configured to generate a signal indicative of the
presence of a perforation 16 in the toweling 12, i.e., a
perforation signal. In the illustrated embodiment, the perforation
sensor 80 is a photo-electronic device and includes a light source
82 positioned on one side of path P and a photo-conductive receiver
84 positioned on an opposite side of path P and is operable to
detect light from the light source 82. The sensor 80 is configured
to generate a signal when it receives light from the light source
82. In this regard, light from the light source 82 is normally
blocked by the toweling 12 between the light source 82 and the
receiver 84. However, if a perforation 16 is positioned between the
light source 82 and the receiver 84, then the light passes through
the perforation 16 to the receiver 84 and the sensor 80 generates
the perforation signal. In the illustrated embodiment, the light
from the light source 82 is directed at a relatively small portion
relative to the width of the toweling 12. In other embodiments the
light source 82 and the receiver 84 can be configured such that the
light source 82 emits light that is directed to more of the
toweling 12, up to the full width of the toweling 12.
Alternatively, the light source 82 and the receiver 84 could be
positioned on the same side of the path P and a reflector (not
shown) positioned on the opposite side of the path P. It should
also be appreciated that the sensor 80 can be based on other known
technologies such as the following: The sensor 80 can be capacitive
and use a capacitive coupled sensor. The sensor 80 can be based on
mechanical detection and detect a perforation 16 through movement
of a micro-switch that mechanically changes states when a
perforation 16 moves past the sensor 80. The sensor 80 can be based
on the hall effect and be configured to sense a marker on the
toweling 12 such as a metal flag. The sensor 80 could be configured
to detect a perforation 16 based on a change in radio
frequency.
A proximity sensor 92 is mounted on main body 22 as shown in FIGS.
2 and 3. The proximity sensor 92 is configured to generate a signal
that is indicative of the presence of a hand or other object. An
alternative on switch 94 is positioned on the housing 20 and is
operable to close an electrical circuit. An emergency off switch 96
is positioned on the housing 20 and is operable to close an
electrical circuit.
A controller 98 is mounted within the housing 20, as shown in FIG.
3, and is electrically connected to the perforation sensor 80, the
motor 62, the battery 68, the emergency off switch 96, the
proximity sensor 92, the position indicating sensors of the loading
door 24, and the on switch 94. The controller 98 is configured to
activate the motor 62, based on a signal from the proximity sensor
92 or the off switch 96 and to deactivate the motor 62 after the
perforation signal is generated by perforation sensor 80. In the
illustrated embodiment, the controller 98 is configured to
deactivate the motor 62 a predetermined time after the perforation
signal is generated such that the perforation 16 is positioned near
the separation device 36. The controller 98 is also configured to
activate the motor 62 when the on switch 94 is closed and to
deactivate the motor 62 when the emergency off switch 96 is
closed.
The present invention can be better understood with respect to the
operation of the dispenser 10 as follows. Prior to dispensing
towels, the roll 14 is placed within the housing 20 and a length of
the toweling 12 extending from roll 14 is threaded along path P so
that the toweling 12 extends from roll 14 through gap 45.
Dispensing of a towel is initiated by moving an object such as a
person's hand such that it is detected by the proximity sensor 92.
The controller 98 activates the motor 62 in response to a signal
generated by the proximity sensor 92 and toweling 12 is dispensed
through gap 45. When a perforation 16 is detected by the
perforation sensor 80, it generates the perforation signal that is
then received by the controller 98. The controller 98 deactivates
the motor 62 after the perforation 16 has passed through the gap
45. In this regard, the perforation 16 is positioned outside of the
housing 20 and a towel can easily be removed by tearing the
toweling 12 at the perforation 16 either free from separation
device 36 or by engaging separation device 36 with the toweling at
the perforation 16.
Referring now to the detection of perforation 16 by the perforation
sensor 80, as can be seen in FIG. 6, each opening of the
perforation 16 has a first diameter D prior to reaching the sensor
roller 54. In the illustrated embodiment, each opening of the
perforation 16 is expanded to have a second diameter D2 between the
sensor roller 54 and the drive roller 52. Each opening of the
perforation 16 is further expanded to have a third diameter D3 if
the opening passes over or near ridge 55 of the sensor roller 54.
The third diameter D3 is greater than the second diameter D2 which
is greater than the first diameter D1. Alternatively, the sensor
roller 54 and the drive roller 52 are not configured to expand the
openings of the perforation 16 prior to detection of the
perforation 16 by the perforation sensor 80. In this alternative,
perforation sensor 80 is configured to detect the perforation 16
when the opening 38 has the first diameter D1.
The present invention also provides a method for loading the towel
dispenser 10. The loading door 24 is moved to its open second
position such that opening 38 is accessible and the sensor roller
54 and the pinch roller 58 are moved clear of path P. The roll 14
is inserted into the housing 20 through the opening 38 and
positioned on tabs 34. A length of toweling 12 is extended from the
roll 14 across the loading door 24 such that it extends over the
sensor roller 54 and the pinch roller 58. The loading door 24 is
moved to the closed first position such that the sensor roller 54
and the pinch roller 58 are moved up into position to define path
P. In this manner, the toweling 12 that was extended over the
sensor roller 54 and the pinch roller 58 is threaded along path P.
The pinch roller 58 traps the toweling 12 against the drive roller
52. In one embodiment, upon closing of the loading door 24, the
controller 98 activates the motor 62 to dispense an individual
towel as described above.
In an alternative embodiment of the present invention, there is
provided a user interface (not shown) which is configured to
provide for selection of a quantity of perforations to be detected
before the motor 62 is deactivated. In this manner, the user can
select the number of paper towels to be dispensed during one
dispensing cycle. The number selected can be displayed on display
99 as can the number of towels actually dispensed per cycle.
The foregoing has described a towel dispenser 10 capable of
dispensing toweling 12 until a perforation 16 within the toweling
12 is detected. While specific embodiments of the present invention
have been described, it will be apparent to those skilled in the
art that various modifications thereto can be made without
departing from the spirit and scope of the invention. Accordingly,
the foregoing description of the preferred embodiment of the
invention and the best mode for practicing the invention are
provided for the purpose of illustration only and not for the
purpose of limitation.
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